A method for measuring the ash content of filled paper through oxygen combustion

Abstract

The invention discloses a method for quickly testing ash contents of filled paper sheets by virtue of oxygen for supporting combustion; the method comprises the steps: firstly, cutting filled paper sheets into a plurality of paper strips with the same size, completely overlapping the paper strips, doubling up the paper strips along the length direction and controlling the angle to be 70-145 degrees after doubling up; secondly, weighing the weight of doubled-up paper samples and the weight of combustion device for holding the doubled-up paper samples; putting the doubled-up paper samples into the combustion device, then sending the entire combustion device into a combustion chamber, introducing oxygen to the combustion chamber in advance, burning the doubled-up paper samples and rapidly combusting the paper samples under the combustion-supporting condition of oxygen; after the combustion of the paper samples is finished, closing an oxygen tank, taking out the combustion device, cooling for a certain period of time in the air, then cooling in a dryer and weighing the weight of the combustion device after cooling; and finally, calculating the ash contents of the filled paper sheets. The method is fast in speed of testing ash contents, accurate in data and capable of completely satisfying the demand of rapidly testing ash contents of the paper sheets in production and scientific research.

Description

technical field [0001] The invention relates to a technique for measuring the ash content of paper, in particular to a method for measuring the ash content of filled paper through oxygen-assisted combustion. Background technique [0002] At present, for the measurement of the ash content of filled paper, the standard method is to measure the ash content after burning the paper sample through a muffle furnace at 525±25°C or 925±25°C, but the traditional muffle furnace uses The biggest problem is resistance wire heating, slow heating process, high ashing time and high energy costs. At the same time, the muffle furnace has problems such as uneven temperature distribution in the furnace, low temperature near the furnace mouth, and large temperature fluctuations; the online ash detection equipment can detect paper Fast real-time analysis of ash content, but this instrument is expensive and not suitable for laboratory environments and factory R&D departments; cutting paper into st...

AI Technical Summary

Problems solved by technology

[0002] At present, for the measurement of the ash content of filled paper, the standard method is to measure the ash content after burning the paper sample through a muffle furnace at 525±25°C or 925±25°C, but the traditional muffle furnace uses The biggest problem is resistance wire heating, slow heating process, high ashing time and high energy costs. At the same time, the muffle furnace has problems such as uneven temperature distribution in the furnace, low temperature near the furnace mouth, and large temperature fluctuations; the online ash detection equipment can detect paper Fast real-time analysis of ash content, but this instrument is expensive and not suitable for laboratory environments and factory R&D departments; cutting paper into strips of a certain size and then burning it in air is a fast method for rapid determination of paper ash content, but This method of measurement cannot completely burn the organic matter in the paper, and the stability of the measured data is poor, and the environmental factors are greatly affected

The principle of potentiometric titration or complexometric titration is to use acid to dissolve the filler in paper, but the process is relatively cumbersome, and the complete reaction is not easy to monitor

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